\documentclass{article}
\usepackage[landscape]{geometry}% http://ctan.org/pkg/geometry
\usepackage{array}% http://ctan.org/pkg/array
\begin{document}

% =========== FACTOR approach ===========
{\renewcommand{\arraystretch}{2}%
\begin{tabular}{|l|l|}
	\hline
	column 1                      & column 2 \      \hline
	I really would like this less & crammed \      \hline
\end{tabular}} \quad
% =========== LENGTH approaches ===========
\begin{tabular}{|l|l|}
	\hline
	column 1                      & column 2 \\[4ex]
	\hline
	I really would like this less & crammed  \\[5pt]
	\hline
\end{tabular} \quad
{\setlength{\extrarowheight}{20pt}%
	\begin{tabular}{|l|l|}
		\hline
		column 1                      & column 2 \      \hline
		I really would like this less & crammed \      \hline
	\end{tabular}}
\end{document}
